Results 111 to 120 of about 11,988 (165)

[Positive cortical support reduction in treatment of trochanteric femur fractures: history in theory establishment and its inspiration for clinical innovations]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Chang S.
europepmc   +1 more source

[Development and electrophysiological validation of a temporal interference transcranial magnetic stimulation system for mice]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Cui C, Wang T, Zhang Y, Zheng W, Xu G.
europepmc   +1 more source

基于有限元法的变压器温度分布特性研究

Gaoya dianqi
变压器是电力系统中的关键设备。为了掌握变压器运行时的损耗和温升情况，文中建立三维多物理场耦合有限元模型，对变压器各部件损耗及温升的分布情况进行仿真。首先，根据变压器铁心各项损耗原理，修正了Bertotti传统损耗分离模型，计算变压器铁心的总损耗，并由此推导出油箱和结构件损耗的计算式。随后，基于绕组几何特征分析绕组损耗各成分计算方法，利用场路耦合法对变压器各部件的损耗分布情况进行仿真计算。最后，运用传热学知识分析油浸式变压器自然换热的具体过程，进行传热和层流两大物理场设计，通过非等温流动多物理场耦合 ...
谢植飚, 王琛, 陈梁远, 黄培, 何世坚, 周松   +5 more
doaj  

[Determination of eight per- and polyfluoroalkyl substances in seawater using dispersive membrane extraction-ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Ren Z, Ma JP, Liu YJ, Zhang L, Wu GG, Li S.   +5 more
europepmc   +1 more source

[Research progress on toxic shock syndrome due to group A <i>Streptococcus</i> infection in children]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wang HY, Zhou W, Huang LS.
europepmc   +1 more source

变压器铁芯接地电流测量与特征分析 Measurement and Characteristic Analysis of the Core Grounding Current of Transformer

, 2015
Jiahui He, Yongqin Wang, X. Tong, Qiyi Zhou   +3 more
semanticscholar   +1 more source

110千伏分级绝缘变压器中性点过电压及其保护

Gaoya dianqi, 1975
多年来,我国对110千伏分级绝缘变压器中点的绝缘水平及其保护问题,争论甚多,至今未有结论。62—63年始,东北及华东220千伏系统采用变压器中点加装间隙以保护中点绝缘的方案,十几年来,运行良好,但间隙整定主要原则之一,即系统单相接地时变压器中点暂态电压的计算方法,东北系统和华东系统（国家标准继电保护篇与过电压保护篇所提的方法与华东同）存在着原则分歧。本文内容有三部分。第一部分，介绍在110千伏系统中以低电压法进行的单相接地实测试验，以及根据实测数据和分析计算得到的单相接地时变压器中点暂态电压的变化规律 ...
doaj  

[Development of a balloon sensor device for force-electrical coupling measurement of esophagus]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Ran P, Zhong Y, Lai Y, Liu L, Zhu Y, Zhu H.   +5 more
europepmc   +1 more source

[Effectiveness of posterior single-level osteotomy with 360° release and correction in treatment of osteoporotic vertebral compression fractures with moderate to severe kyphosis]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Qing P, Xu H, Hu Y, Xie B, Wang T, Zhang L.   +5 more
europepmc   +1 more source

[Research progress of meniscal centralization for degenerative medial meniscus extrusion]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao Q, Niu X, Huang J.
europepmc   +1 more source